JIS G 3452chiyereso cheJapan chinodonongodza pombi yesimbi yakasungwa yekutakura chiutsi, mvura, oiri, gasi, mhepo, nezvimwe.JIS G 3452 ine giredhi rimwe chete, SGP, rinogona kugadzirwa neresistance welding (RW) kana butt welding.
JIS G 3452 Mapaipi eSimbi achagadzirwa achishandisa musanganiswa wakakodzera wenzira dzekugadzira pombi uye nzira dzekupedzisa.
| Symbol yegiredhi | Chiratidzo chekugadzira nzira | Kurongeka kwe zinc-coating | |
| Pombi yekugadzira nzira | Kupedzisa nzira | ||
| SGP | Magetsi anopokana akaiswa welded: E Butt welded: B | Kupisa-kupedzwa: H Kutonhora-kupedzwa: C Sezvo magetsi anopokana akaiswa welded: G | Mapaipi matema: mapaipi asina kupihwa zinc-coating Mapaipi machena: mapaipi akapihwa zinc-coating |
Mapombi anowanzo kuendeswa seakagadzirwa.Mapombi anotonhora anopedzwa anozovharwa mushure mekugadzirwa.
Kana pombi yakagadzirwa ne ERW, mawelds ari mukati nekunze kwepombi anofanira kubviswa kuti awane weld yakatsetseka pamwe ne contour yepombi.
Kana yakaganhurirwa nekuda kwedhayamita yepombi kana midziyo, nezvimwewo, iyo weld iri mukati memukati haigone kubviswa.
Kugadzirira: Pamberi pekupisa-dip galvanizing, pamusoro pepombi yesimbi inofanira kunyatsocheneswa nejecha, pickling, nezvimwe.
Ukobvu: Pazinc-coating, iyo distilled zinc ingot Kirasi 1 inotsanangurwa muJIS H 2107 kana zinc ine kanenge yakaenzana mhando kune iyi ichashandiswa.
Zvimwe: Zvimwe zvinodikanwa zvekugadzira galvanizing zvinoenderana neJIS H 8641.
Muedzo: Kuyerwa kwekufanana kweiyo galvanized coating zvinoenderana neJIS H 0401 Chinyorwa 6.
Pamusoro pezvinhu zvakapihwa, zvimwe zvinhu zvealloying zvinogona kuwedzerwa sezvinodiwa.
| Chiratidzo chegiredhi | P (Phosphorus) | S (Sulfur) |
| SGP | hukuru 0.040 % | hukuru 0.040 % |
JIS G 3452 ine zvirambidzo zvishoma pakuumbwa kwemakemikari nekuti JIS G 3452 inonyanya kushandiswa kune zvakajairwa-chinangwa maapplication sekufambisa chiutsi, mvura, oiri, uye gasi rechisikigo.Iko kemikari yezvinyorwa haisi iyo inonyanya kukosha, asi pane iyo mechanical properties yepombi kuti idzivirire kushanda kwekushanda.
Tensile Properties
| Chiratidzo chegiredhi | Kusimba simba | Elongation, min,% | ||||||
| Test chidimbu | Test direction | Kukora kwemadziro, mm | ||||||
| N/mm² (MPA) | ＞3 ≤ 4 | ＞4 ≤ 5 | ＞5 ≤ 6 | ＞6 ≤ 7 | ＞7 | |||
| SGP | 290 min | Nha.11 | Parallel kune pombi axis | 30 | 30 | 30 | 30 | 30 |
| Nha.12 | Parallel kune pombi axis | 24 | 26 | 27 | 28 | 30 | ||
| Nha.5 | Perpendicular kune pombi axis | 19 | 20 | 22 | 24 | 25 | ||
Kune mapaipi ezita rekuti 32A kana pasi, iwo elongation kukosha mutafura iyi haashande, kunyangwe iwo elongation mhedzisiro yebvunzo icharekodhwa.Muchiitiko ichi, chinodiwa elongation chakabvumiranwa pakati pemutengi nemugadziri chinogona kushandiswa.
Flattening Property
Kukura: Kumachubhu ane dhayamita rezita rakakura kupfuura 50A (2B).
Hapana anotsemuka kana chubhu yakatsetseka kusvika 2/3 yekunze kwedhayamita yechubhu.
Bendability
Kukura: Kwemachubhu esimbi ane dhayamita yezita ≤ 50A (2B).
Benda mufananidzo kusvika 90 ° neradius yemukati yekatanhatu kunze kwedhayamita yepombi pasina kuburitsa kupi nekutsemuka.
Imwe neimwe pombi yesimbi inofanirwa kuve neiyo hydrostatic pressure test kana bvunzo isiri yekuparadza.
Hydrostatic Test
Kudzvinyirira: 2.5 MPa;
Nguva: Bata kweinenge 5 masekonzi;
Kutonga: simbi pombi pasi pekumanikidzwa pasina kubuda.
Muedzo usingaparadzi
Iyo ultrasonic bvunzo yakatsanangurwa muJIS G 0582 ichashanda.Chiyero chebvunzo chinogona kunge chakanyanya kuoma kupfuura Chikamu cheEU.
Iyo eddy yazvino bvunzo yakatsanangurwa muJIS G 0583 ichashanda.Chiyero chebvunzo chinogona kunge chakanyanya kuoma kupfuura Chikamu EZ.
Pamapombi ane mazita madhayamita ≥ 350A (14B), verenga dhayamita nekuyera denderedzwa, iyo mamiriro ekushivirira ari ± 0.5%.
Rudzi rwepombi kupera kweDN≤300A/12B: shinda kana kuti flat end.
Rudzi rwepombi kupera kweDN≤350A/14B: kupera kwakadzika.
Kana mutengi achida magumo akakomberedzwa, kona yebevel ndeye 30-35 °, bevel upamhi hwesimbi pombi mupendero: max 2.4mm.
JIS G 3452 ine zvakaenzana mukatiASTM A53uyeGB/T 3091, uye zvinhu zvepombi zvinotsanangurwa mumitemo iyi zvinogona kuonekwa zvakaenzana kune imwe neimwe maererano nekushanda uye kushandiswa.
Kubva payakavambwa muna 2014, Botop Steel yave mutengesi anotungamira wekabhoni simbi pombi kuChamhembe kweChina, inozivikanwa nebasa repamusoro, zvigadzirwa zvemhando yepamusoro, uye mhinduro dzakakwana.
Iyo kambani inopa dzakasiyana siyana dzekabhoni simbi mapaipi uye zvigadzirwa zvine hukama, zvinosanganisira isina musono, ERW, LSAW, uye SSAW simbi pombi, pamwe neyakakwana mutsara wepombi fittings uye flanges.Zvigadzirwa zvayo zvehunyanzvi zvinosanganisira alloys epamusoro-giredhi uye austenitic simbi isina tsvina, yakagadzirirwa kusangana nezvinodiwa zveakasiyana mapurojekiti epombi.
Taura nesu, timu yehunyanzvi yakagadzirira kukupa masevhisi emhando yepamusoro uye mhinduro, tichitarisira kusvika pakubatana kunofadza newe, uye pamwe chete kuvhura chitsauko chitsva chebudiriro.
